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` 2 t1. MCGAHEY a FOOTE. ees ee ,Grain Separator.

No. 28,679. Patented lune 12, 1860.

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2 Sheets-Sheet 2. MCGAHEY & FOOTE.

Grain Separator.

No. 28,679. Patented June 12, 1860.

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W. T. MCGAHEY, OF MCGAHEYSV ILLE, VIRGINIA, AND H. C. FOOTE, OF FHEDERICKTO'WN,

OHIO.

GRAIN-SEPARATOR.

ySpecification of Letters Patent No. 28,679, dated June-12 1,860.

To all whom it may concern:

Be it known that we, IV. T. MCGAHEY, of McGaheysville, Rockingham county, Virginia, and HENRY C. Foorn, of Fredericktown, Knox county, Ohio, have invented a new and useful Improvement in Grain- Separators; and we do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a partof this specification, in which- Figure l, represents a top view; Fig. 2, a longtudinal vertical section; Fig. 3, a front view of the machine, and Figs. 4, 5, and 6, views of detached portions of the machine.

Similar letters of reference in each `of the several figures indicate corresponding parts.

The nature of our invention consists, first, in a conducting board with sieve, in combination with a partially perforated screen and apron, spout and inclined plane, in the manner 'hereinafter described.

It consists, second, in an inclined plate or board which presents a screening and a blasting surface on the same plane, in combination with an upper reversely inclined conducting board and a lower reversely inclined tailing discharge board as hereinafter described.

It consists, third, in Van apron having spouts in combination with a condensing screen.

It consists, fourth, in a shoe containing a conducting board, partially perforated screen, spout, apron, sieves, screen and apron having spouts in combination with a single revolving screen.

The object o the whole arrangement is to submit the grain .to a morev Vthorough and more properly subdivided cleaning operation, than in any of the mills which have heretofore been in use.

To enable others, skilled in lthe art, tov

conducting The component parts of the shoe are as follows: A receptacle a, is provided with a bottom inclined toward the front of the machine. A similarly inclined sieve b, joins the front edge of the inclined bottom of .the receptacle and serves as a continuation of the latter. The sieve I), is placed over and covers a conducting board (l, the front end of this sieve is provided with one or two directors c, which incline toward one or both sides of the machine. In Fig. 1 these directors are shown inclining both ways so as Ato be adapted to two spouts, -similar to the one shown at e, f. The upper end of the spout opens above the board d through the upright side of vthe shoe, -into the space between the sieve 7) and board d, the opening being at the outer end of the Vdirector c, c, as shown. A number of parallel rake teeth g, are attached to the forward end of board (Z, the teeth extending beyond the front .edge of the `revolviing screen r, g. Underneath the rake g, and the board d, thereis a screenv z', 7L, inclined toward the rear of the machine. The part h, of the screen projecting beyond the front edge of the conducting board is smooth and closed, while the rear part z', of the screen (which is underneath the conducting board) is perforated. A smooth closed apron j, inclined toward the front of the machine is placed underneath the yscreen z'., IL, the rear f ends of the screen 71,' it, and apron j, vmeeting at z, as shown. Underneath the apron j, there is a perforated screen Je, inclined toward the front of `the-machine and lits rear portion extending solne distance back of the rcarcdgcs .of z', and y'. A sieve l, the holes .of which are smaller .than the vperforations ,of screen lo, :is arranged below the screen Ic, and above an apron m, the forward end w, of which yterminates into a number of spouts a, which spouts project through corresponding openings in the conducting screen p. The upper portion of screen p, is made preferably smooth and closed, while the lower part (below the spout a) is perforated. An apron 0, is arranged underneath the screen p, the rear end of apron 0, shutting against the lower end of screen p. The sieve Z, and aprons m, and 0, are inclined forward, while the screen p, inclines toward the rear of the machine.

The operation of the machine is as follows: The grain passes from the receptacle a, over the conduit board CZ, or sieve through rake g, and over screen z', onto screen la, and through the perforations of the latter onto sieve Z. It passes over sieve Z, and drops between the front edge of sieve Z, and screen p (through the open spaces between each two of the spouts n) onto the lower part of screen p, and finally onto the revolving screen 1'. While the grain thus moves from the receptacle a, to the revolving screen, it is subjected to the cleaning and separating action of the blast of wind, in the following manner. The fine sand, cheat and cockle, &c., mixed with the grain drops through the small sized meshes of sieve b, onto the inclined board cZ, which conducts these impurities down its surface, against the angular directors c, and through the spout e, f, down onto apron y'. Any remaining garlic, smut, cheat and -cockle, are subjected to the further separating operation by means of the screen z', h, and blast, the heavier substances passing through the perforations i, and the lighter substances passing over the plain surface h. The foreign substances thus separated from the grain, pass over the front end of the inclined apron y', out of the machine. Chaff and similar substances of larger size are prevented from passing down the machine by the combined agency of rake teeth g and blast and are blown out of the machine, by the blast of wind passing up through the rake teeth. The front end of board cZ, being but little distance from screen z', ZL, the wind is here contracted and acts with increased force so as to make sure of all the chaff being blown out of the machine. Fine dirt and similar impurities which may have failed to pass through screen b, are blown over the smooth part i1., of screen 7L, z', before they can get onto the perforated part i, of it. They pass out of the machine together with the chaff. Any of the larger sized impurities which may have found their way with the wheat down the machine onto screen la, will pass over this screen and be blown out of the machine. vFine or broken impurities still mixed with the grain, pass through sieve Z, onto apron m, and through spouts n, onto apron 0, and from thence out of the mill, while the grain passes down the inclined screen p, into .the revolving screening cylinder 1', where it is subjected to a thorough agitation and blast whereby it is perfectly deprived of impurities, the plain blasting surface g, answering well for insuring the separation by blast, of the garlic and smut.

From the above description, it will be seen that the dirt to be blown off, falls on smooth surfaces n, p and q, and not on sieves, by which means it is blown off easier and far more thoroughly than if it were to be blown over the uneven surfaces of sieves, as t-he blast `is more direct on closed surfaces than it is in perforated ones. It will also be noticed that the rake over which the chaffl is blown extends somewhat beyond the front edge of the revolving screen, so that the chaff cannot by any means find its way down onto the revolving screen and there mingle with the grain.

Vhat we claim as our invention and desire to secure by Letters Patent isl. A conducting' board CZ, with sieve Z), in combination with a partially perforated screen z', h, and apron y', spout e, f, and angular directors, c, substantially as and for the purposes set forth.

2. An inclined plate or board h, z', which presents a screening and blasting surface on the same plain, in combination with the inclined conducting board CZ, and inclined tailing discharge board j, substantially as and for the purposes set forth.

3. An apron m, having spouts n, in combination with a conducting screen p, substantially as and for the purposes set forth.

4. A shoe a t, containing a conducting board d, partially perforated screen z', h, spout f, apron p, sieves 7:, Z, conducting screen p, and apron m, having spouts n, in combination with a single revolving screen r, g, substantially as and for the purposes set forth.

W. T. MGGAHEY. H. C. FOOTE.

Witnesses as to signature of W. T. Mc- Gahey:

GOODWIN G. AT LEE, R. W. FENWICK. Witnesses as to signature of H. C. Foote:

JNO. W. MELHORN, WM. HAMMEN. 

